http://www.medications.com/effect/view/29418 I have been taking kelone for 20 yrs due to palpitations and a rapid HR the pappitations got worse over the last few months and I was panicky so I went to the dr and this is what happened! I was put on metoprolol 25mg 2x's a day and it didn't work. I fou Mon, 25 Aug 2008 11:05:25 -0400 http://www.medications.com/effect/view/29418?item=11568 i have hyperthyroidism, for about 3 years now, i was then given Atenolol, the dr said it was for the heart. After a few months, i went to another doctor, and i was given metoprolol, 50mg and i was to take it in half, for life.i sometimes feel a prick on my http://www.medications.com/effect/view/29418?item=11568